9K-21+12=0

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Solution for 9K-21+12=0 equation: 


Simplifying
9K + -21 + 12 = 0

Reorder the terms:
-21 + 12 + 9K = 0

Combine like terms: -21 + 12 = -9
-9 + 9K = 0

Solving
-9 + 9K = 0

Solving for variable 'K'.

Move all terms containing K to the left, all other terms to the right.

Add '9' to each side of the equation.
-9 + 9 + 9K = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 9K = 0 + 9
9K = 0 + 9

Combine like terms: 0 + 9 = 9
9K = 9

Divide each side by '9'.
K = 1

Simplifying
K = 1

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